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killer app — ˈkiller ˌapp also killer ap noun [singular] 1. COMPUTING MARKETING a very useful or exciting computer program that customers feel they must have: • An example of a killer app is the spreadsheet program. 2 … Financial and business terms

killer app — UK [ˈkɪlər ˌæp] / US noun [countable] Word forms killer app : singular killer app plural killer apps computing informal killer application: a piece of software that is so popular that it makes many people buy the computer system that it operates… … English dictionary

killer app — kill|er app [ kılər ,æp ] noun count COMPUTING killer application: a piece of software that is so popular that it makes many people use the computer system that it operates on … Usage of the words and phrases in modern English

killer app — noun Date: 1988 a computer application of such great value or popularity that it assures the success of the technology with which it is associated; broadly a feature or component that in itself makes something worth having or using … New Collegiate Dictionary